IPhone 4 stuck in constant reboot cycle (not jailbroken)?

A few days ago, I shut down my iPhone 4 and attempted to reboot it. Upon rebooting it, however, I found out that the lock screen was frozen. I tried to do a hard reset, but had no success. The iPhone would only start up (apple logo would show for about 10 seconds) and then freeze at the lock screen. I attempted to restore the iPhone, but I'm having the same problem. The iPhone is now in this extremely frustrating cycle: (1) Reboot (2) Frozen restore screen (3) Black screen. Even worse, the iPhone is doing this by itself, whether I attempt to turn it off or not. I don't know if anyone else has had a similar problem, but I'd really like to figure out what's going on. My iPhone is about a year old, has no water damage and has not been jailbroken. It was working well until I tried to turn it off. Any help is appreciated.

Take it to the genius bar in the apple store. But be sure to make an appointment first

Iphone 4 sucks. I have one too. You plug in with charger and see…
Else wait for whole battery to drain and then again see it after charging…

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